Although the new
Microsoft live maps version of google earth absoloutlyleaves google standing at the moment, google DO have google maps for yo' phone.
and it works, and you can find where you are, and a sattelite view route of how to get where you want to be.
its ace (though not amazingly cheap to run at aroun 110kb a screen.
downloading and having a good look around derby cost me 2quid worth of DL time (but i get 4 quid amonth free) we will see how quick i use up the remaining 2 quid!
downloady here (they send you a link by txt and you download it through your phones browser)